Study of kaonic nuclei by the d(φ+;K+) reaction at J-PARC

Yudai Ichikawa, H. C. Bhang, S. Bufalino, H. Ekawa, P. Evtoukhovitch, A. Feliciello, H. Fujioka, S. Hasegawa, Shuhei Hayakawa, Ryotaro Honda, K. Hosomi, K. Imai, S. Ishimoto, W. C. Joo, S. Kanatsuki, R. Kiuchi, T. Koike, H. Kumawat, Y. Matsumoto, K. MiwaT. Nagae, M. Naruki, M. Niiyama, Y. Nozawa, R. Ota, A. Sakaguchi, H. Sako, V. Samoilov, S. Sato, K. Shirotori, H. Sugimura, S. Suzuki, T. Takahashi, T. N. Takahashi, H. Tamura, T. Tanaka, K. Tanida, A. O. Tokiyasu, Z. Tsamalaidze, B. J. Roy, M. Ukai, T. O. Yamamoto, S. B. Yang

Research output: Contribution to journalConference articlepeer-review


An experimental search for the K-pp bound state, which is considered the simplest kaonic nucleus, is performed by using the d(φ ++) reaction at J-PARC K1.8 beam line (J-PARC E27 experiment). The first data taking as a pilot run was carried out in June, 2012. The missing-mass spectrum of this reaction studied at the beam momentum of 1.7 GeV/c, which allows the production of (1405), was obtained for the first time and a significant peak shift by ∼40 MeV was observed in the Y∗ region. In a preliminary proton-coincidence analysis, a sharp spike due to the ∼N-\λN coupling and a broad enhancement around 2.3 GeV/c2, which might be attributed to the K-pp bound state, was clearly observed.

Original languageEnglish
JournalProceedings of Science
Publication statusPublished - 2013
Event15th International Conference on Hadron Spectroscopy, Hadron 2013 - Nara, Japan
Duration: 2013 Nov 42013 Nov 8

ASJC Scopus subject areas

  • General


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